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Keying with Ultimatte

This section explains how to use the blue/green screen keyer, Ultimatte, in Nuke.

Ultimatte Quick Start

Here's a quick overview of the workflow:

1.   Sample the screen (backing) color. For more information, see Sampling the Screen Color.
2.   Refine the overlay using the overlay tools and, if needed, adjust the controls on the Ultimatte tab. For more information, see Using Overlay Tools and Screen Correct.
3.   Next refine the matte density using the matte tools and, if needed, adjust the controls on the Density tab. For more information, see Adjusting the Density of the Matte .
4.   If necessary, activate Shadow processing, and use Shadow tool and, if needed, adjust the controls on the Shadow tab. For more information, see Retaining Shadows and Removing Noise.
5.   If necessary, improve Spill Suppression using spill tools and, if needed, adjust the controls on the Spill tab. For more information, see Adjusting Spill Controls.
6.   If necessary, adjust the Cleanup controls, but in general you’ll get better results by using ScreenCorrect and MatteDensity controls. For more information, see Retaining Shadows and Removing Noise.
7.   If necessary, you can adjust the controls on the Color tab to match your blacks, whites and gammas between the foreground and the background. For more information, see Adjusting Color Controls.
8.   If necessary, activate film processing and adjust its settings on the Film tab. For more information, see Adjusting Film Controls.